Bed-motion for printing-presses.



N0; 7ll,625. Patented Oct. 2!, I902.

H. HABTT. BED MOTION FOR PRINTING PBESSES.

(Application filed Jan. 26, 1901.)

5 Sheets-Sheet I.

(No Model.)

No. 7||,s25. Patentd Oct. 2|, I902.

H. HART'T;

BED MOTION FOR PRINTING PBESSES.

(Application filed .nm. 2a, 1901. (No Model.) 5 $heeis$h eot 2,

N0. 71!,625. Patented Oct. 21,1902.

H. HARTT. BED MOTION FOR PRINTING PRESSES.

(Application filed Jan. 25, 1901.)

(No Model.)

- @zagwg m. 7||,s25. f v Patented Oct. 2|, 1902. H. HARTT.

BED MOTION FOR PRINTING PRESSES.,

(Application filed Jan. 25, 1901.)

(No Model.) 5 sheets sheet .5.

Mwu

{UNITED STATES- :PATENT OFFICE.

HENRYIIARTT, OF CHICAGO, ILLINOIS.

BED-MOTION FoR PRlNTlNG-PRESSES.

SPECIFICATION formingpart of Letters Patent No. '71 1,625, dated October 21, 1902.

Application filed January 25, 1901. Serial No. 44,694. \No model.)

To all whom it may concern.-

Be it known that I, HENRY HARTT, a citizen of the United States of America, and a resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Bed-Motions for Print-- ing-Presses, of which the following is a specification.

My invention relates to the bed-motion for versing the bed movement at the end of the stroke.

In the said drawings, A represents the framework of a printing-press, and A a secondary framework for supporting the bedmoviug devices. The bed B has secured to it an upper rack-B and a lower rack Bfiwhich are supported from the bed B by the arms B. Secured to each arm B are two rollers C and O, which rollers are acted upon bya cam for reversing the motion of the bed. Suitably supported in the frame Aand in the secondary frame A is a driving-shaft D, on which are gears D, D and D Adjacent to and parallel with the shaft D is a long bearing E,

which is pivoted to the'shaft D by two arms E and E Extending downward from the arm E is another arm E the lower end of which is provided with a roller E, which is engaged by a cam H on a shaft II; also, on the shaft H is a gear H which is driven by the gear D on the shaft D. Inside of the bearing E is a sleeve F, on the outer end of which is a gear F, located in the plane of the racks B and B The gear F is driven by the gear D and is of such size that the cam H acting upon the roller E will move the bearing E, so as to shift the gear'F from rack B to rack B or vice versa. Inside of the sleeve F is a shaft G, on the front end of which is a cam G and on the other end of which is a gear G driven by the gear D on :the shaft D. The cam G is in the form of a lip projecting from its face, as shown in Figs. 1 and 3 to 8. Inside of the cam G is a loose roller G mounted upon a pivot G It will be apparent from the description just given that the cam G rotates upon a center G, which is the shaft which drives it. The lip of the cam G is cut away at one face, so that the roller 0 may enter the groove between the lip and the interior roller G Fig.

1 shows the bed at the middle of its stroke I with the gear F in engagement with the lower rack 13 the direction of movement being that shown by the arrow on the rack B As this motion continues the bed will be moved to the left, and the rollers O and O at the right end of the bed will be moved toward the cam G. As the bed moves toward the left the cam G will rotate on its center G. By the time the end of the rack reaches the center of the shaft G the cam H reaches a position just prior to the time when it begins to shift the gear F from its lower to its upper position. Two successive stages of the cam H are shown in Figs. 4c and 5. Also as the left end of the bed approaches the cam G the correspondingsuccessive stages of said cam G are also shown in Figs. 4 and 5, the latter 'figure showing when the lip begins to enter the space between the rollers O and 0'. As the motion continues the cam will engage first the roller 0 between the lip and the inner roller G but subsequently will engage the outer roller 0. Fig. 6 shows the position when the cam G has completed a halfrevolution from the position shown in Fig. 4. In Fig. 7 the position of the cam G is advanced to the point where it begins to leave the roller 0 and the cam H is at the position which has shifted the gear F from its lower to its upper position. In this position the gear F engages the rack 13 and is moving the bed rapidly toward the right, so that by the time the cam G has moved tothe position shown in Fig. 8 the roller 0 is clear of the forward lip of said cam. Inarranging the movements here described I have made the devices so that the length of the rack B or the rack B is equal tothe circumference of the gear F, and consequently one revolution of the gear F will make a complete reciprocation of said bed minus thatpart of the motion which is used in stopping and starting. For the purpose of reducing the time of stopping and starting to a period occupied by one-half of the revolution of the gear F, I arrange the drive for the gear F and the cam G so that the said cam makes two revolutions to one of the gear. By this means a complete revolution of the said cam is occupied in stopping, reversing, and starting the bed-motion. It will be noticed that the bearing E is long and substantial, the sleeve F, which carries the gear F, is also long and eX- tends within the bearing, and, further, that the shaft G is also within the sleeve. I thus have a movable bearing, a sleeve within the bearing, and a shaft within the sleeve, all of which makes a condensed and convenient construction. It will also be noticed that the cam revolvesin the same direction as the gear and upon the same center.

WVhat I claim is 1. In the bed-motion of a printing-press, a bearing and means for moving it, a sleeve within said bearing, a bed-moving gear mounted on the end of said sleeve, a shaft Within said sleeve, a bed-reversing cam on said shaft,

and means for driving said shaft.

2. In the bed-moving devices of a printingpress, a movable bearing, a sleeve within said bearing, a shaft within said sleeve, bed-driving and bed-reversing devices on said sleeve and shaft respectively, and means for driving said sleeve and said shaft.

3. In a printing-press, a movable bed, upper and lower racks secured to said bed, a gear and means for moving it from one rack to the other, a bed-reversing cam adjacent to said gear and rotating on a center coincident with the center of said gear, and means for driving said cam at a speed greater than the speed of said gear.

4. In a printing-press, a movable bed, upper and lower racks secured to said bed, a bearing, a sleeve within said bearing, a shaft within said sleeve, a gear secured to said sleeve, a bed-reversing cam secured to said shaft, separate driving devices for said gear and said cam, one or more rollers secured to each end of said bed and arranged to be engaged by said cam, and means for moving said hearing so as to shift said gear from one rack to the other.

5. In the bed-reversing devices of a print ing-press, a revolving shaft, a grooved cam driven to said shaft, said cam having one of its operating-faces rigidly secured to said shaft and another operating-face loosely carried by said shaft so that it is movable thereon, and rollers acted upon by the rigid and loose faces of said cam.

Signed at Chicago, Illinois, this 23d day of January, 1901.

HENRY IIARTT.

\Vitnesses:

R. E. SMALE,

O. L. REDFIELD. 

